io.vertx.core.spi.metrics

Interface PoolMetrics<T>

All Superinterfaces:

Metrics

public interface PoolMetrics<T>
extends Metrics

An SPI used internally by Vert.x to gather metrics on pools used by Vert.x (execute blocking, worker verticle or data source).

Usually these metrics measure the latency of a task queuing and the latency a task execution.

Author:

Clement Escoffier

Method Summary

Modifier and Type	Method and Description
T	begin(T t) The submitted task start to use the resource.
void	end(T t, boolean succeeded) The submitted tasks has completed its execution and release the resource.
void	rejected(T t) The task has been rejected.
T	submitted() A new task has been submitted to access the resource.

Methods inherited from interface io.vertx.core.spi.metrics.Metrics

close, isEnabled

Method Detail

submitted

T submitted()

A new task has been submitted to access the resource. This method is called from the submitter context.

Returns:

the timer measuring the task queuing

begin

T begin(T t)

The submitted task start to use the resource.

Parameters:

t - the timer measuring the task queuing returned by submitted()

Returns:

the timer measuring the task execution

rejected

void rejected(T t)

The task has been rejected. The underlying resource has probably be shutdown.

Parameters:

t - the timer measuring the task queuing returned by submitted()

end

void end(T t,
         boolean succeeded)

The submitted tasks has completed its execution and release the resource.

Parameters:

succeeded - whether or not the task has gracefully completed

t - the timer measuring the task execution returned by begin(T)